Years ago I posted about “tails count twice” meaning that they all impose downforce. That downforce has to be countered by the lift on the front foil. The drag from say 25 lbs of downforce is equaled by the drag of 25 lbs of upforce . . . . long story short - Tails should go away!
As you work your way towards smaller and smaller tails you just get used to the reduce drag and necessity of a rear “Stabilizer”. Example: I was running the Axis Skinny 30 tail and loving it. Just 86 cm. Never thought that would be enough for any reasonable situation but it was fast and pumped, granted I was on bigger faster open ocean Pacific swells.
I don’t think we will get to ZERO but will keep working our way in that direction. Meanwhile the front wings (foils) will likely have to accommodate smaller and smaller stabilizers and the world could get better still.